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A space ship is launched into a circular orbit close to the surface of the earth. The additional velocity now imparted to the spaceship in the orbit to overcome the gravitational pull is

a
11.2kms−1
b
8kms−1
c
3.2kms−1
d
1.414×8kms−1

detailed solution

Correct option is C

ve=11.2km/smv′2R=GMmR2v′2=GMR2R=8km/sTherefore, the additional velocity =(11.2−8)=3.2km/s

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